US9126250B2 - Leveling machine with multiple rollers - Google Patents

Leveling machine with multiple rollers Download PDF

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Publication number
US9126250B2
US9126250B2 US13/395,171 US200913395171A US9126250B2 US 9126250 B2 US9126250 B2 US 9126250B2 US 200913395171 A US200913395171 A US 200913395171A US 9126250 B2 US9126250 B2 US 9126250B2
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Prior art keywords
leveling
cassette
back plate
contact surface
vertical
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US13/395,171
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US20120174644A1 (en
Inventor
Jean-Pierre Chazal
Bernard Dumas
Vincent Philippaux
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Clecim SAS
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Siemens VAI Metals Technologies SAS
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Assigned to SIEMENS VAI METALS TECHNOLOGIES SAS reassignment SIEMENS VAI METALS TECHNOLOGIES SAS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHAZAL, JEAN-PIERRE, DUMAS, BERNARD, PHILIPPAUX, VINCENT
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Assigned to Primetals Technologies France SAS reassignment Primetals Technologies France SAS CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS VAI METALS TECHNOLOGIES SAS
Assigned to Clecim SAS reassignment Clecim SAS CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Primetals Technologies France S.a.s.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies

Definitions

  • the invention relates to a machine for leveling thick metal plates or strips that, henceforth, shall be referred to generically as “strips”.
  • Leveling devices are used to remove flatness defects in strips following hot or cold rolling. Indeed, for example after the hot rolling, cooling and conditioning phases, the rolled products may have non-developable flatness defects, such as defects known as edge wave or center buckle, or developable flatness defects, such as bowing defects. These geometric defects visibly affect rolled products.
  • Levelers with multiple rollers arranged such that they overlap, establishing an undulating route for the strip, which is then subjected to bending effects in alternating directions, are used to level such rolled metal strips.
  • a metal plate or strip leveling installation comprises, in general, a lower leveling cassette and an upper leveling cassette, each fitted with a plurality of leveling rollers that are in direct contact with the strip. These leveling rollers are usually supported by support rollers.
  • leveling cassettes are included in the structure of the leveler which comprises vertical beams, the bottoms of which are rigidly connected by a generally fixed back plate and the tops of which are rigidly connected by horizontal upper beams.
  • the lower cassette is supported by the lower back plate and the upper cassette is supported by a pressure frame to which it is bolted.
  • the lower cassette is fixed and the upper cassette can move vertically in order to adjust the gap between the leveling rollers and thereby determine the undulating route of the strip.
  • This gap and the transfer of the cassette separation stress, attributable to the resistance of the strip, are effected by hydraulic closing cylinders bearing on one side against the upper beams and on the other against the pressure frame.
  • a motorized drive system makes it possible to actuate the rollers in rotation and, by friction, to move the strip forward at a given speed.
  • FIG. 1 is a schematic view of a leveling machine in the prior art in which the upper cassette 5 a is supported by a pressure frame 4 that is movable vertically using hydraulic cylinders bearing against the upper horizontal cross members 3 a , 3 b rigidly connected to the vertical beams.
  • the machine comprises a fixed lower back plate 1 supporting a lower leveling cassette 5 b rigidly connected to two pairs of vertical beams 2 a , 2 b .
  • the top of each beam 2 a , 2 b is connected to a horizontal cross member 3 a , 3 b .
  • a pressure frame 4 guided in vertical translation between the beams 2 is forced on to the upper cassette 5 a by four closing cylinders 6 .
  • Each cassette 5 a , 5 b has several leveling rollers 51 a , 51 b supported by bearings 52 a , 52 b and held by support rollers 53 a , 53 b , themselves supported by bearings 54 a , 54 b .
  • the leveling machine also includes return cylinders 8 enabling the pressure frame 4 and therefore the upper cassette 5 a to be moved upwards.
  • document EP 0 570 770 discloses the use of cylinders arranged between the upper leveling rollers and the upper pressure frame of a leveling machine. These cylinders enable the bending of the leveling rollers occurring during passage of the strip of material between the rollers to be offset. These offsetting rollers act in conjunction with cylinders enabling an upper frame with a rigidly connected upper leveling cassette to be moved.
  • the leveling machine is also fitted with a plurality of sensors measuring the deformation of the rollers and providing information to a processor that controls the offsetting cylinders and the cylinders enabling the frame to be moved.
  • Document JP A 2000 326012 also discloses a leveling machine comprising a plurality of offsetting cylinders installed between an upper frame and the upper rollers of a leveling machine. Other cylinders bearing against horizontal cross members change the position of the upper leveling rollers by acting on the upper back plate of the leveling machine.
  • leveling machines comprise a stack of superimposed layers formed by an upper cassette, bend correction cylinders, the pressure frame, main closing cylinders and upper horizontal cross members.
  • a leveling machine for very wide, thick strips can weigh more than 600 tons and be more than ten meters high.
  • a pressure frame on its own may weigh more than 70 tons. It is therefore important to minimize the mass and size of leveling machines.
  • the invention is intended to address the problems identified above and, in particular, to limit the stacking of structural members and cylinders in order to limit the height of the machine and, in particular, the length of the vertical beams. It is also intended to provide a leveling machine of lesser volume and mass than known leveling machines, while fulfilling the same functions and, in particular, enabling the bending of leveling cassettes caused by the passage of the material being leveled to be offset.
  • the first object of the invention is a machine for leveling a strip of material comprising:
  • the invention also relates to a flexible leveling cassette the thickness of which varies between a maximum value and a minimum value, and that is intended to cooperate with a leveling machine as defined above.
  • the leveling cassette comprises a plurality of maximum-thickness zones intended to cooperate with the closing cylinders of the leveling machine, the maximum-thickness zones being separated from one another by a minimum-thickness zone.
  • the maximum thickness value may be between 1.5 and 4 times the minimum thickness value and may preferably be between 2 and 2.5 times this value.
  • the total height of the leveling machine according to the invention is therefore less than known machines and, unlike leveling machines in the prior art, it does not have conventional pressure frames or horizontal cross members, which saves tens of tons from the structure and lightens the leveling machine according to the invention.
  • the invention also enables the retraction cylinders to be removed from the pressure frame and the upper cassette, which represents a significant saving as these cylinders, of which there are normally four, have to be powerful enough to lift a mass of up to around 100 tons. Furthermore, they usually have significant travel in order to enable the closing cylinders to be disassembled. These cylinders are therefore very heavy and require the implementation of high-pressure hydraulic circuits and a significant quantity of oil. Removal of all of these devices has the additional effect of reducing the mass of the leveling machine by several tens of tons.
  • FIG. 1 is a front schematic view of a leveling machine in the prior art
  • FIG. 2 is a front schematic view of a leveling machine according to the invention
  • FIG. 3 is a detailed view showing a leveling cassette connected to the upper back plate of a leveling machine according to the invention
  • FIG. 4 is a cross-section view of FIG. 1 .
  • FIG. 5 is a cross-section view of a flexible upper leveling cassette used in a leveling machine according to the invention.
  • the leveling machine according to the invention shown in FIG. 2 includes a lower back plate 1 , fixed during use of the leveling machine, supporting a lower leveling cassette 5 b .
  • Two pairs of vertical beams 2 a , 2 b extend upwards from the lower back plate 1 and are fixed rigidly to this latter.
  • each pair of vertical beams 2 a , 2 b is placed on one side of an imaginary vertical plane passing through the longitudinal axis of movement P (shown in FIG. 4 ) of the strip of material.
  • a fixed upper back plate 11 is attached rigidly to the upper extremity of each of the vertical beams 2 a , 2 b.
  • the leveling machine also comprises closing cylinders 10 attached firstly to the fixed upper back plate 11 and in contact secondly with an upper face of the upper leveling cassette 5 a .
  • the closing cylinders 10 When deployed, the closing cylinders 10 bear against the back plate 11 and force the rollers 51 a of the upper leveling cassette 5 a against the material to be leveled.
  • the closing cylinders therefore cause firstly the rollers 51 a of the upper leveling cassette and the rollers 51 b of the lower leveling cassette 5 b to move closer together and secondly, as a function of the relative vertical movement thereof, they offset the bending of the upper leveling cassette 5 a caused by the separation stress generated by passage of the strip to be leveled.
  • Coupling means 9 attach the upper leveling cassette 5 a to the back plate 11 , while enabling vertical movement of the upper leveling cassette 5 a under the action of the closing cylinders 7 .
  • FIG. 3 shows an embodiment of the coupling means.
  • the upper leveling cassette 5 a bearing the leveling rollers 51 a and the bearings 52 a thereof is coupled to the upper back plate 11 by means of two cylinders 111 supported on the roller drive side by flanges 113 of the upper back plate 11 .
  • Each head of the cylinder 111 is engaged in a retaining hook 56 a of the upper leveling cassette 5 a .
  • each head of the cylinder 111 may include a cylindrical retaining portion 111 b , the axis of which is perpendicular to the axis of the rod 111 a of the cylinder 111 .
  • the upper leveling cassette 5 a is also coupled to the upper back plate 11 by means of two more cylinders 112 supported on the side opposite the roller drive side by L-shaped parts 114 that are moveable in rotation in relation to the fixed upper back plate 11 .
  • Each head of the cylinder 112 is engaged in a retaining hook 56 b of the upper leveling cassette 5 a .
  • each head of the cylinder 112 may include a cylindrical retaining portion 112 b the axis of which is perpendicular to the axis of the rod 112 a of the cylinder 112 .
  • each cylindrical retaining portion 111 b , 112 b may include two vertical stops located on either side of each retaining hook 56 a that are intended to stop the upper leveling cassette 5 a in horizontal translation.
  • the cylinders 111 , 112 therefore support the upper leveling cassette 5 a while assisting the relative movements between the upper leveling cassette 5 a and the upper back plate 11 under the action of the cylinders 10 .
  • Each movable part 114 is fixed to an axle of the back plate 11 and can turn about this axle, each axle being supported by a flange 1100 of the back plate 11 .
  • At least one additional cylinder 115 able to pivot at least one movable part 114 extends between one extremity of the movable part 114 and one other flange 1200 of the back plate 11 .
  • the rods of the closing cylinders 10 extend until the upper leveling cassette 5 a is resting on the lower leveling cassette 5 b .
  • the rods 111 a and 112 a of the retaining cylinders 111 , 112 follow the movement of the upper leveling cassette 5 a downwards.
  • the rods 111 a and 112 a of the retaining cylinders 111 , 112 continue their downward movement until each retaining hook 56 a is released.
  • the additional cylinder 115 pivots the supporting element 114 which retracts the cylinder 112 upwards and the upper leveling cassette can be removed in the direction of the arrow 1300 , from the side opposite the drive side of the leveling rollers 51 a.
  • the pressure frame is guided between the vertical beams and the upper leveling cassette is coupled thereto using devices that follow the movements of the bend correction cylinders.
  • the upper cassette is not guided between the vertical beams or between the uprights of the lower cassette.
  • the absence of the pressure frame enables the cassette to be guided itself between the vertical beams or between the uprights of the lower cassette, which considerably improves the precision of the movements thereof.
  • FIG. 4 shows an embodiment of the system for guiding the leveling equipment between the beams 2 a and 2 b . It should be noted that FIG. 4 is a schematic cross-section view of the leveling machine taken through the bearings 52 a and 52 b , in a plane parallel to the imaginary vertical plane passing through the longitudinal axis of movement of the strip of material.
  • each vertical beam 2 a , 2 b has an inner vertical contact surface 21 a intended to cooperate with another contact surface to guide at least one leveling cassette 5 a , 5 b of the leveling machine in translation.
  • the lower leveling cassette 5 b includes vertical uprights 55 b extending upwards from the base of the lower cassette 5 b to guide it outside the leveling machine during assembly and disassembly operations.
  • Each upright 55 b includes an outer vertical surface 59 in contact with an inner vertical surface 21 a of one of the beams 2 a , 2 b such as to ensure a precise positioning and to guide the lower leveling cassette 5 b in translation.
  • the uprights 55 b and the lower leveling cassette 5 b are therefore connected by a sliding joint.
  • the two contact surfaces 59 and 21 a extend at least partially facing one another.
  • each upright 55 b of the lower leveling cassette 5 b is positioned such as to act as a translational guide for the upper leveling cassette 5 a . Consequently, each upright of the lower leveling cassette 5 b also includes an inner vertical surface 57 b in contact with an outer surface 55 a of the upper leveling cassette.
  • the contact surfaces 55 a and 57 b extending at least partially facing one another when the leveling machine is fully assembled, cooperate to guide the upper leveling cassette 5 a in translation in relation to the lower leveling cassette 5 b .
  • the upper and lower leveling cassettes are therefore linked by a sliding joint which guarantees the relative positioning thereof to a high degree of accuracy.
  • each outer contact surface 55 a of the upper leveling cassette may be slightly convex. This enables an inclined position of the upper cassette 5 a in relation to the lower cassette 5 b between the strip input side between the leveling rollers and the output side.
  • each positioning contact 58 b receives a supporting element 57 a , which guarantees the rigid attachment of the two cassettes.
  • the lower leveling cassette 5 b does not have uprights 55 b and the upper leveling cassette is guided in vertical translation directly by the beams 2 a , 2 b of the leveling machine.
  • each outer contact surface 55 a of the upper leveling cassette 5 a cooperates with an inner vertical contact surface 21 a of one of the beams 2 a , 2 b .
  • the lower leveling cassette 5 a is therefore connected to the uprights 2 a , 2 b of the leveling machine by a sliding joint.
  • the contact surfaces 21 a , 56 b , 57 b and 55 a may be coated with an abradable material, encouraging parts such as surface-hardened steel plates to slide against one another.
  • the closing cylinders 10 are arranged in line in the same direction as the longitudinal axis of the rollers.
  • the leveling machine has two lines of three closing cylinders 10 each. A first line of three closing cylinders 10 acts on the side the strip enters the upper leveling cassette 5 a , while another line of closing cylinders acts on the output side of the leveling cassette, as shown schematically in FIG. 4 .
  • An additional condition for the correct operation of roller bend correction is the deformation capacity of the upper leveling cassette in the same direction as the longitudinal axis of the rollers. This condition is easily satisfied when leveling thick strips, which involves very high levels of upper- and lower-cassette separation stress. In the case of thinner strips, it may be necessary to change the shape of the upper leveling cassette in order to reduce the bending inertia thereof.
  • FIG. 5 shows an example of an upper leveling cassette having a greater bending deformation capacity than upper leveling cassettes in the prior art.
  • the lower leveling cassette 5 a shown in FIG. 5 has a lower deformation inertia than upper leveling cassettes in the prior art.
  • the thickness e of the upper leveling cassette 5 a varies between a maximum value e 1 and a minimum value e 2 .
  • Each support surface of the closing cylinders 10 is located in a zone z 1 where the thickness e of the upper leveling cassette 5 a is greatest in order to ensure maximum resistance of the upper leveling cassette 5 a against the bend-correction and closing stresses transmitted by the closing cylinders 10 .
  • each zone of maximum thickness z 1 is at least equal to the diameter of the extremity 10 a of the cylinder 10 with which it is in contact.
  • the zones z 2 of minimum thickness e 2 between the zones z 1 of maximum thickness help to reduce the deformation inertia of the upper cassette 5 a and thereby to achieve rapid and efficient bend correction.
  • These zones z 2 have a length l 2 less than the length l 1 .
  • the embodiment shown in FIG. 5 includes five zones z 1 of maximum thickness, two at the extremities of the upper leveling cassette 5 a and three in the supporting portions of the upper leveling cassette 5 a cooperating with the closing cylinders 10 . These zones z 1 of constant maximum thickness e 1 are separated by three zones z 2 of constant minimum thickness e 2 , facilitating the bending of the whole of the upper leveling cassette 5 a .
  • the upper leveling cassette therefore has a cross section in the shape of saw teeth truncated at the upper and lower parts thereof.
  • the maximum thickness value may be between 1.5 and 4 times the minimum thickness value and may preferably be between 2 and 2.5 times this value.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Machine Tool Units (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US13/395,171 2009-09-09 2009-09-30 Leveling machine with multiple rollers Active 2031-07-01 US9126250B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP09290685 2009-09-09
EP09290685.8 2009-09-09
EP09290685 2009-09-09
PCT/EP2009/062659 WO2011029485A1 (fr) 2009-09-09 2009-09-30 Machine de planage a rouleaux multiples

Publications (2)

Publication Number Publication Date
US20120174644A1 US20120174644A1 (en) 2012-07-12
US9126250B2 true US9126250B2 (en) 2015-09-08

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US13/395,171 Active 2031-07-01 US9126250B2 (en) 2009-09-09 2009-09-30 Leveling machine with multiple rollers

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US (1) US9126250B2 (de)
EP (1) EP2475473B1 (de)
JP (1) JP2013503752A (de)
KR (1) KR101606237B1 (de)
CN (1) CN102481611B (de)
BR (1) BR112012005193B1 (de)
ES (1) ES2401979T3 (de)
IN (1) IN2012DN02039A (de)
PL (1) PL2475473T3 (de)
RU (1) RU2518828C2 (de)
SM (1) SMT201300037B (de)
WO (1) WO2011029485A1 (de)

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US20150143864A1 (en) * 2010-01-29 2015-05-28 Jp Steel Plantech Co. Roller leveler
CN108405643A (zh) * 2018-02-08 2018-08-17 嘉善翱鹰五金制品厂 一种合页挤压成型装置
CN108453193A (zh) * 2018-02-08 2018-08-28 嘉善翱鹰五金制品厂 一种用于合页生产的固定装置
CN108480410A (zh) * 2018-02-08 2018-09-04 嘉善翱鹰五金制品厂 一种用于合页生产的挤压机构
US11179759B2 (en) 2015-07-22 2021-11-23 Sms Group Gmbh System and method for removing flatness faults from a metal flat product

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DE102012204074A1 (de) 2012-03-15 2013-09-19 Sms Siemag Ag Vorrichtung zum Richten von Metallband
FR2996476B1 (fr) * 2012-10-05 2015-02-13 Snecma Procede de fabrication d'une piece couverte d'un revetement abradable
KR101359427B1 (ko) 2013-11-29 2014-02-24 서광기연 주식회사 풍력 발전기 시공을 위한 트랜지션 피스의 레벨링 모의 시험기
EP2881187B1 (de) * 2013-12-05 2016-04-06 Arku Maschinenbau Gmbh Walzenrichtmaschine sowie Verfahren zum Inspizieren, Warten und Instandhalten einer Walzenrichtmaschine
KR101376785B1 (ko) 2013-12-20 2014-03-20 서광기연 주식회사 트랜지션 피스의 수평 제어시스템
CN104384246B (zh) * 2014-09-30 2017-07-28 巢湖广丰金属制品有限公司 一种带钢精细整形自动控制系统和方法
CN104275369B (zh) * 2014-10-15 2016-04-27 首钢总公司 一种应用于平整机的辊形配置方法及平整机
JP6440454B2 (ja) 2014-10-30 2018-12-19 日本発條株式会社 板状ワークの反り矯正装置と、反り矯正方法
CN105170722A (zh) * 2015-10-08 2015-12-23 扬中中科维康智能科技有限公司 一种大型折弯机载荷时上下模的挠性补偿方法
CN108637106A (zh) * 2018-07-12 2018-10-12 无锡新奇生电器有限公司 一种圆钢折弯组合模
CN109604377A (zh) * 2018-12-24 2019-04-12 杭州恒创机电有限公司 拉弯矫直机矫辊总成
CN111531035B (zh) * 2020-05-09 2021-02-12 佛山市顺德区新越精密五金有限公司 一种金属件矫形模具
CN112756429B (zh) * 2020-11-30 2024-06-25 中冶华天工程技术有限公司 一种操作侧机架移动式矫直机组合机架
CN112605161B (zh) * 2021-01-05 2023-01-06 太原科技大学 垫板自动放置装置及基于此装置的宽厚板压力矫平方法

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JPS5945030A (ja) 1982-09-07 1984-03-13 Nippon Steel Corp ロ−ラ−レベラ−
US4881392A (en) 1987-04-13 1989-11-21 Broken Hill Proprietary Company Limited Hot leveller automation system
JP2637577B2 (ja) 1989-11-06 1997-08-06 三菱重工業株式会社 ローラレベラ
JPH0475609U (de) 1990-10-31 1992-07-02
EP0508475A2 (de) 1991-04-12 1992-10-14 Sumitomo Heavy Industries, Ltd Streckrollen-Richtmaschine
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FR2912073A1 (fr) 2007-02-02 2008-08-08 Siemens Vai Metals Tech Sas Procede et dispositif de demontage des equipage de planage dans une planeuse a rouleaux multiples
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US20150143864A1 (en) * 2010-01-29 2015-05-28 Jp Steel Plantech Co. Roller leveler
US9248486B2 (en) * 2010-01-29 2016-02-02 Jp Steel Plantech Co. Roller leveler
US11179759B2 (en) 2015-07-22 2021-11-23 Sms Group Gmbh System and method for removing flatness faults from a metal flat product
CN108405643A (zh) * 2018-02-08 2018-08-17 嘉善翱鹰五金制品厂 一种合页挤压成型装置
CN108453193A (zh) * 2018-02-08 2018-08-28 嘉善翱鹰五金制品厂 一种用于合页生产的固定装置
CN108480410A (zh) * 2018-02-08 2018-09-04 嘉善翱鹰五金制品厂 一种用于合页生产的挤压机构

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US20120174644A1 (en) 2012-07-12
EP2475473A1 (de) 2012-07-18
CN102481611A (zh) 2012-05-30
PL2475473T3 (pl) 2013-05-31
WO2011029485A1 (fr) 2011-03-17
BR112012005193B1 (pt) 2019-10-22
JP2013503752A (ja) 2013-02-04
IN2012DN02039A (de) 2015-08-21
RU2518828C2 (ru) 2014-06-10
KR20120060884A (ko) 2012-06-12
ES2401979T3 (es) 2013-04-25
EP2475473B1 (de) 2012-12-26
CN102481611B (zh) 2015-10-21
BR112012005193A2 (pt) 2016-03-08
RU2012113625A (ru) 2013-10-20
SMT201300037B (it) 2013-05-06
KR101606237B1 (ko) 2016-03-24

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